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Noise reduction apparatus
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Patent number 5,455,779
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Issue date Oct 3, 1995
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Hitachi, Ltd.
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Noriharu Sato
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Electronic instrument panel
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Patent number 4,752,771
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Issue date Jun 21, 1988
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Hitachi, Ltd.
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Kouzou Katogi
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Liquid crystal display device
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Patent number 4,708,440
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Issue date Nov 24, 1987
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Hitachi, Ltd.
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Masaru Kugo
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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